Very good, the low gain is 2 and the high gain is 7 as you can imagine I used the low gain setting. Using an iPod as a source via a line out dock the performance of the amp using iem's or earbuds I found: 1. Good channel balance. 2. No hiss. 3. Easy to set up the volume even with the Westone 2 or the TripleFi 10.
As a 21 year resident in 33139 I can say that life on the beach can be a lot of fun but it will cost you! If you could stay an extra month you could ...
I read your impressions on the Portaphile 627 and I concur with your findings. I do not have ultra sensitive IEM's (Westone 2 and TripleFi 10) so I did not hear the hiss you did. I sure hope Cesar can increase the battery life to around 10 hours.